It is narrated from Matlub bin Abdullah bin Hantab Makhzumi that a man asked the Messenger of Allah, peace and blessings be upon him: What is backbiting? He, peace and blessings be upon him, said: "To mention something about someone which, if he hears it, he would dislike." He said: O Messenger of Allah, peace and blessings be upon him! Even if it is true? He, peace and blessings be upon him, said: "If it is a lie, then it is slander."